8 Citations (Scopus)


Stomata rapidly and slowly respond to a range of abiotic stress, regulating water status. Under water-sufficient conditions, the majority of water loss in plants occurs through open stomata. Under environmental conditions that cause stomata to close, such as during drought, water loss is mainly executed via solid-phase cuticular transpiration. The diffusional resistance of the transpiration pathway consists of two varying components: the leaf stomatal resistance and the leaf boundary layer resistance. Dehydration avoidance mechanisms involve the maintenance of a high (favorable) plant water status during stress. Many cacti, orchids, bromeliads, and other succulent plants with crassulacean acid metabolism (CAM) have stomatal activity patterns that contrast with those found in C3 and C4 plants. Tolerance to low water potentials requires maintaining plant functions under limited water availability and/or the rapid recovery of plant water status and plant function after stress.

Original languageEnglish
Title of host publicationPlant Abiotic Stress, Second Edition
PublisherWiley Blackwell
Number of pages21
ISBN (Electronic)9781118764374
ISBN (Print)9781118412176
Publication statusPublished - Jan 28 2014


  • Abiotic stress
  • C4 plants
  • Crassulacean acid metabolism
  • Plant water status
  • Stomatal regulation
  • Transpiration

ASJC Scopus subject areas

  • Agricultural and Biological Sciences(all)


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